1 files changed, 458 insertions, 0 deletions
diff --git a/src/ap/ieee802_11_shared.c b/src/ap/ieee802_11_shared.c
new file mode 100644
index 0000000000000..76f78a7dbd9c1
--- /dev/null
+++ b/src/ap/ieee802_11_shared.c
@@ -0,0 +1,458 @@
+/*
+ * hostapd / IEEE 802.11 Management
+ * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "utils/includes.h"
+
+#include "utils/common.h"
+#include "common/ieee802_11_defs.h"
+#include "hostapd.h"
+#include "sta_info.h"
+#include "ap_config.h"
+#include "ap_drv_ops.h"
+#include "ieee802_11.h"
+
+
+#ifdef CONFIG_IEEE80211W
+
+u8 * hostapd_eid_assoc_comeback_time(struct hostapd_data *hapd,
+				     struct sta_info *sta, u8 *eid)
+{
+	u8 *pos = eid;
+	u32 timeout, tu;
+	struct os_time now, passed;
+
+	*pos++ = WLAN_EID_TIMEOUT_INTERVAL;
+	*pos++ = 5;
+	*pos++ = WLAN_TIMEOUT_ASSOC_COMEBACK;
+	os_get_time(&now);
+	os_time_sub(&now, &sta->sa_query_start, &passed);
+	tu = (passed.sec * 1000000 + passed.usec) / 1024;
+	if (hapd->conf->assoc_sa_query_max_timeout > tu)
+		timeout = hapd->conf->assoc_sa_query_max_timeout - tu;
+	else
+		timeout = 0;
+	if (timeout < hapd->conf->assoc_sa_query_max_timeout)
+		timeout++; /* add some extra time for local timers */
+	WPA_PUT_LE32(pos, timeout);
+	pos += 4;
+
+	return pos;
+}
+
+
+/* MLME-SAQuery.request */
+void ieee802_11_send_sa_query_req(struct hostapd_data *hapd,
+				  const u8 *addr, const u8 *trans_id)
+{
+	struct ieee80211_mgmt mgmt;
+	u8 *end;
+
+	wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Request to "
+		   MACSTR, MAC2STR(addr));
+	wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
+		    trans_id, WLAN_SA_QUERY_TR_ID_LEN);
+
+	os_memset(&mgmt, 0, sizeof(mgmt));
+	mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
+					  WLAN_FC_STYPE_ACTION);
+	os_memcpy(mgmt.da, addr, ETH_ALEN);
+	os_memcpy(mgmt.sa, hapd->own_addr, ETH_ALEN);
+	os_memcpy(mgmt.bssid, hapd->own_addr, ETH_ALEN);
+	mgmt.u.action.category = WLAN_ACTION_SA_QUERY;
+	mgmt.u.action.u.sa_query_req.action = WLAN_SA_QUERY_REQUEST;
+	os_memcpy(mgmt.u.action.u.sa_query_req.trans_id, trans_id,
+		  WLAN_SA_QUERY_TR_ID_LEN);
+	end = mgmt.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
+	if (hostapd_drv_send_mlme(hapd, &mgmt, end - (u8 *) &mgmt, 0) < 0)
+		perror("ieee802_11_send_sa_query_req: send");
+}
+
+
+static void ieee802_11_send_sa_query_resp(struct hostapd_data *hapd,
+					  const u8 *sa, const u8 *trans_id)
+{
+	struct sta_info *sta;
+	struct ieee80211_mgmt resp;
+	u8 *end;
+
+	wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Request from "
+		   MACSTR, MAC2STR(sa));
+	wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
+		    trans_id, WLAN_SA_QUERY_TR_ID_LEN);
+
+	sta = ap_get_sta(hapd, sa);
+	if (sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) {
+		wpa_printf(MSG_DEBUG, "IEEE 802.11: Ignore SA Query Request "
+			   "from unassociated STA " MACSTR, MAC2STR(sa));
+		return;
+	}
+
+	wpa_printf(MSG_DEBUG, "IEEE 802.11: Sending SA Query Response to "
+		   MACSTR, MAC2STR(sa));
+
+	os_memset(&resp, 0, sizeof(resp));
+	resp.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
+					  WLAN_FC_STYPE_ACTION);
+	os_memcpy(resp.da, sa, ETH_ALEN);
+	os_memcpy(resp.sa, hapd->own_addr, ETH_ALEN);
+	os_memcpy(resp.bssid, hapd->own_addr, ETH_ALEN);
+	resp.u.action.category = WLAN_ACTION_SA_QUERY;
+	resp.u.action.u.sa_query_req.action = WLAN_SA_QUERY_RESPONSE;
+	os_memcpy(resp.u.action.u.sa_query_req.trans_id, trans_id,
+		  WLAN_SA_QUERY_TR_ID_LEN);
+	end = resp.u.action.u.sa_query_req.trans_id + WLAN_SA_QUERY_TR_ID_LEN;
+	if (hostapd_drv_send_mlme(hapd, &resp, end - (u8 *) &resp, 0) < 0)
+		perror("ieee80211_mgmt_sa_query_request: send");
+}
+
+
+void ieee802_11_sa_query_action(struct hostapd_data *hapd, const u8 *sa,
+				const u8 action_type, const u8 *trans_id)
+{
+	struct sta_info *sta;
+	int i;
+
+	if (action_type == WLAN_SA_QUERY_REQUEST) {
+		ieee802_11_send_sa_query_resp(hapd, sa, trans_id);
+		return;
+	}
+
+	if (action_type != WLAN_SA_QUERY_RESPONSE) {
+		wpa_printf(MSG_DEBUG, "IEEE 802.11: Unexpected SA Query "
+			   "Action %d", action_type);
+		return;
+	}
+
+	wpa_printf(MSG_DEBUG, "IEEE 802.11: Received SA Query Response from "
+		   MACSTR, MAC2STR(sa));
+	wpa_hexdump(MSG_DEBUG, "IEEE 802.11: SA Query Transaction ID",
+		    trans_id, WLAN_SA_QUERY_TR_ID_LEN);
+
+	/* MLME-SAQuery.confirm */
+
+	sta = ap_get_sta(hapd, sa);
+	if (sta == NULL || sta->sa_query_trans_id == NULL) {
+		wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching STA with "
+			   "pending SA Query request found");
+		return;
+	}
+
+	for (i = 0; i < sta->sa_query_count; i++) {
+		if (os_memcmp(sta->sa_query_trans_id +
+			      i * WLAN_SA_QUERY_TR_ID_LEN,
+			      trans_id, WLAN_SA_QUERY_TR_ID_LEN) == 0)
+			break;
+	}
+
+	if (i >= sta->sa_query_count) {
+		wpa_printf(MSG_DEBUG, "IEEE 802.11: No matching SA Query "
+			   "transaction identifier found");
+		return;
+	}
+
+	hostapd_logger(hapd, sta->addr, HOSTAPD_MODULE_IEEE80211,
+		       HOSTAPD_LEVEL_DEBUG,
+		       "Reply to pending SA Query received");
+	ap_sta_stop_sa_query(hapd, sta);
+}
+
+#endif /* CONFIG_IEEE80211W */
+
+
+u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
+{
+	u8 *pos = eid;
+	u8 len = 0;
+
+	if (hapd->conf->tdls & (TDLS_PROHIBIT | TDLS_PROHIBIT_CHAN_SWITCH))
+		len = 5;
+	if (len < 4 && hapd->conf->interworking)
+		len = 4;
+	if (len < 3 && hapd->conf->wnm_sleep_mode)
+		len = 3;
+	if (len < 7 && hapd->conf->ssid.utf8_ssid)
+		len = 7;
+#ifdef CONFIG_WNM
+	if (len < 4)
+		len = 4;
+#endif /* CONFIG_WNM */
+	if (len == 0)
+		return eid;
+
+	*pos++ = WLAN_EID_EXT_CAPAB;
+	*pos++ = len;
+	*pos++ = 0x00;
+	*pos++ = 0x00;
+
+	*pos = 0x00;
+	if (hapd->conf->wnm_sleep_mode)
+		*pos |= 0x02; /* Bit 17 - WNM-Sleep Mode */
+	if (hapd->conf->bss_transition)
+		*pos |= 0x08; /* Bit 19 - BSS Transition */
+	pos++;
+
+	if (len < 4)
+		return pos;
+	*pos = 0x00;
+#ifdef CONFIG_WNM
+	*pos |= 0x02; /* Bit 25 - SSID List */
+#endif /* CONFIG_WNM */
+	if (hapd->conf->time_advertisement == 2)
+		*pos |= 0x08; /* Bit 27 - UTC TSF Offset */
+	if (hapd->conf->interworking)
+		*pos |= 0x80; /* Bit 31 - Interworking */
+	pos++;
+
+	if (len < 5)
+		return pos;
+	*pos = 0x00;
+	if (hapd->conf->tdls & TDLS_PROHIBIT)
+		*pos |= 0x40; /* Bit 38 - TDLS Prohibited */
+	if (hapd->conf->tdls & TDLS_PROHIBIT_CHAN_SWITCH)
+		*pos |= 0x80; /* Bit 39 - TDLS Channel Switching Prohibited */
+	pos++;
+
+	if (len < 6)
+		return pos;
+	*pos = 0x00;
+	pos++;
+
+	if (len < 7)
+		return pos;
+	*pos = 0x00;
+	if (hapd->conf->ssid.utf8_ssid)
+		*pos |= 0x01; /* Bit 48 - UTF-8 SSID */
+	pos++;
+
+	return pos;
+}
+
+
+u8 * hostapd_eid_interworking(struct hostapd_data *hapd, u8 *eid)
+{
+	u8 *pos = eid;
+#ifdef CONFIG_INTERWORKING
+	u8 *len;
+
+	if (!hapd->conf->interworking)
+		return eid;
+
+	*pos++ = WLAN_EID_INTERWORKING;
+	len = pos++;
+
+	*pos = hapd->conf->access_network_type;
+	if (hapd->conf->internet)
+		*pos |= INTERWORKING_ANO_INTERNET;
+	if (hapd->conf->asra)
+		*pos |= INTERWORKING_ANO_ASRA;
+	if (hapd->conf->esr)
+		*pos |= INTERWORKING_ANO_ESR;
+	if (hapd->conf->uesa)
+		*pos |= INTERWORKING_ANO_UESA;
+	pos++;
+
+	if (hapd->conf->venue_info_set) {
+		*pos++ = hapd->conf->venue_group;
+		*pos++ = hapd->conf->venue_type;
+	}
+
+	if (!is_zero_ether_addr(hapd->conf->hessid)) {
+		os_memcpy(pos, hapd->conf->hessid, ETH_ALEN);
+		pos += ETH_ALEN;
+	}
+
+	*len = pos - len - 1;
+#endif /* CONFIG_INTERWORKING */
+
+	return pos;
+}
+
+
+u8 * hostapd_eid_adv_proto(struct hostapd_data *hapd, u8 *eid)
+{
+	u8 *pos = eid;
+#ifdef CONFIG_INTERWORKING
+
+	/* TODO: Separate configuration for ANQP? */
+	if (!hapd->conf->interworking)
+		return eid;
+
+	*pos++ = WLAN_EID_ADV_PROTO;
+	*pos++ = 2;
+	*pos++ = 0x7F; /* Query Response Length Limit | PAME-BI */
+	*pos++ = ACCESS_NETWORK_QUERY_PROTOCOL;
+#endif /* CONFIG_INTERWORKING */
+
+	return pos;
+}
+
+
+u8 * hostapd_eid_roaming_consortium(struct hostapd_data *hapd, u8 *eid)
+{
+	u8 *pos = eid;
+#ifdef CONFIG_INTERWORKING
+	u8 *len;
+	unsigned int i, count;
+
+	if (!hapd->conf->interworking ||
+	    hapd->conf->roaming_consortium == NULL ||
+	    hapd->conf->roaming_consortium_count == 0)
+		return eid;
+
+	*pos++ = WLAN_EID_ROAMING_CONSORTIUM;
+	len = pos++;
+
+	/* Number of ANQP OIs (in addition to the max 3 listed here) */
+	if (hapd->conf->roaming_consortium_count > 3 + 255)
+		*pos++ = 255;
+	else if (hapd->conf->roaming_consortium_count > 3)
+		*pos++ = hapd->conf->roaming_consortium_count - 3;
+	else
+		*pos++ = 0;
+
+	/* OU #1 and #2 Lengths */
+	*pos = hapd->conf->roaming_consortium[0].len;
+	if (hapd->conf->roaming_consortium_count > 1)
+		*pos |= hapd->conf->roaming_consortium[1].len << 4;
+	pos++;
+
+	if (hapd->conf->roaming_consortium_count > 3)
+		count = 3;
+	else
+		count = hapd->conf->roaming_consortium_count;
+
+	for (i = 0; i < count; i++) {
+		os_memcpy(pos, hapd->conf->roaming_consortium[i].oi,
+			  hapd->conf->roaming_consortium[i].len);
+		pos += hapd->conf->roaming_consortium[i].len;
+	}
+
+	*len = pos - len - 1;
+#endif /* CONFIG_INTERWORKING */
+
+	return pos;
+}
+
+
+u8 * hostapd_eid_time_adv(struct hostapd_data *hapd, u8 *eid)
+{
+	if (hapd->conf->time_advertisement != 2)
+		return eid;
+
+	if (hapd->time_adv == NULL &&
+	    hostapd_update_time_adv(hapd) < 0)
+		return eid;
+
+	if (hapd->time_adv == NULL)
+		return eid;
+
+	os_memcpy(eid, wpabuf_head(hapd->time_adv),
+		  wpabuf_len(hapd->time_adv));
+	eid += wpabuf_len(hapd->time_adv);
+
+	return eid;
+}
+
+
+u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid)
+{
+	size_t len;
+
+	if (hapd->conf->time_advertisement != 2)
+		return eid;
+
+	len = os_strlen(hapd->conf->time_zone);
+
+	*eid++ = WLAN_EID_TIME_ZONE;
+	*eid++ = len;
+	os_memcpy(eid, hapd->conf->time_zone, len);
+	eid += len;
+
+	return eid;
+}
+
+
+int hostapd_update_time_adv(struct hostapd_data *hapd)
+{
+	const int elen = 2 + 1 + 10 + 5 + 1;
+	struct os_time t;
+	struct os_tm tm;
+	u8 *pos;
+
+	if (hapd->conf->time_advertisement != 2)
+		return 0;
+
+	if (os_get_time(&t) < 0 || os_gmtime(t.sec, &tm) < 0)
+		return -1;
+
+	if (!hapd->time_adv) {
+		hapd->time_adv = wpabuf_alloc(elen);
+		if (hapd->time_adv == NULL)
+			return -1;
+		pos = wpabuf_put(hapd->time_adv, elen);
+	} else
+		pos = wpabuf_mhead_u8(hapd->time_adv);
+
+	*pos++ = WLAN_EID_TIME_ADVERTISEMENT;
+	*pos++ = 1 + 10 + 5 + 1;
+
+	*pos++ = 2; /* UTC time at which the TSF timer is 0 */
+
+	/* Time Value at TSF 0 */
+	/* FIX: need to calculate this based on the current TSF value */
+	WPA_PUT_LE16(pos, tm.year); /* Year */
+	pos += 2;
+	*pos++ = tm.month; /* Month */
+	*pos++ = tm.day; /* Day of month */
+	*pos++ = tm.hour; /* Hours */
+	*pos++ = tm.min; /* Minutes */
+	*pos++ = tm.sec; /* Seconds */
+	WPA_PUT_LE16(pos, 0); /* Milliseconds (not used) */
+	pos += 2;
+	*pos++ = 0; /* Reserved */
+
+	/* Time Error */
+	/* TODO: fill in an estimate on the error */
+	*pos++ = 0;
+	*pos++ = 0;
+	*pos++ = 0;
+	*pos++ = 0;
+	*pos++ = 0;
+
+	*pos++ = hapd->time_update_counter++;
+
+	return 0;
+}
+
+
+u8 * hostapd_eid_bss_max_idle_period(struct hostapd_data *hapd, u8 *eid)
+{
+	u8 *pos = eid;
+
+#ifdef CONFIG_WNM
+	if (hapd->conf->ap_max_inactivity > 0) {
+		unsigned int val;
+		*pos++ = WLAN_EID_BSS_MAX_IDLE_PERIOD;
+		*pos++ = 3;
+		val = hapd->conf->ap_max_inactivity;
+		if (val > 68000)
+			val = 68000;
+		val *= 1000;
+		val /= 1024;
+		if (val == 0)
+			val = 1;
+		if (val > 65535)
+			val = 65535;
+		WPA_PUT_LE16(pos, val);
+		pos += 2;
+		*pos++ = 0x00; /* TODO: Protected Keep-Alive Required */
+	}
+#endif /* CONFIG_WNM */
+
+	return pos;
+}